function getCookie(c_name) {
	if (document.cookie.length > 0) { 
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start != -1) { 
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(";", c_start);
			if (c_end == -1) {
				c_end = document.cookie.length;
			}
			return unescape(document.cookie.substring(c_start, c_end));
		} 
	}
	return null;
}

function setCookie(c_name, value) {
	var hoje = new Date();
	var expirar = new Date( hoje.getTime() + 28 * 24 * 60 * 60 * 1000 );
	document.cookie = c_name + "=" + escape(value) + "; expires=" + expirar.toGMTString();	
}
